Safety-switch for motor-vehicles.



W. MACGLASHAN. SAFETY SWITCH FOR MOTOR VEHICLES.

APPLICATION FILED FEB.5, 1913.

Patented A1322 28, 1914.

2 SHEETSSHEBT W. MAGGLASHAN. SAFETY SWITCH FOR MOTOR VEHICLES.

Patented A1111 28, 1914.

2 SHEETS-SHEET 2.

fiwomeqs APPLICATION FILED FEB.5, 1913 1,094,798.

I To aZl-wlmm UNITED STATES WILLIAM MACGLASHAN, OF SOUTH BEND,

CORPORATION, OF SOUTH BEND, INDIANA, Gt

SAFETY-SWITCH MGLGR V Specification. of Lettc Patent. Application filed February 5, 1913.

it may concern:

v Be it .znown that I, VVILLIAM irlncGnasnax, a citizen of the United States of America, residing, at South Bend, St. Joscph county, State of Indiana, have invented certain new and useful Improvements in Safety-Swit-cl1es for Motor Vehicles, of which the following is a specification.

This invention 'relates to an electric switch, particularly adapted for use in con nection with electrically driven road vehicles. Such vehicles are commonly provided with a switch independent of the controller by means of which the circuit may be opened when for any reason the controller cannot be conveniently operated or refuses to act. It is also used to open the circuit when the machine is idle to prevent leakage or accidental starting); and for safety in overhauling, and to prevent unauthorized use of the machine the switch is provided with a removable hey. The ditlicultv commonly e2;- pericnccd in connection with the operation of such switches, is due to the fact that owing to ignorance or inaclvertence on the part of the operator the controller will sometimes be. open atthe switch or the machine stopped by opening the circuit at the switch anc later with the controller in position to pass considerable current through the armaturc, the switch will be thrown in and the circuit closed. Under these circumstances the machine starts suddenly and often unexpectediy and serious accidentshave resulted. ()n the other hand if the machine is heavily loaded so its inertia cannot be overcome instantly the motor is apt to he burned out for the hack electro-inotivc force and the electrical resistance in the motor are slight; and the flow of current excessive with correspondingly great tendency to burn out the motor.

The switch which is the subject of this in 'vention is constructed for the purpose of overcoming this ditficulty, and by its use accidental starts and burning out of the motor under the circumstances described are rendered practically impossible.

Described in general terms, thede'vice consists of automatic means for locking the switch out oi. contact so that the eirciiiit is held open together with means connected to and moving With the controller for render;

ing the locking means on the switch inoperamoved from neutral with the circuit l tire when the coi'itroliei' at x'ieutral i in the ne rat positioiu and. only in the new trai position of the controller, can the switch be opcrv d to close the Circuit. Thus it. is "cm impossible, once the switch t- ""u out. to a. current through th notor with the controller in the pos ,ion of full speed forward or baclc ward, or halt speed aaclcward or forward, or in any position. other than the neutral posi tion.

Described more spe itically, the dci'ice in its pi'cterrml term cc ists of a pivoted switch incl-ling; and l'reahingr the circuit which may he provided with a movable key for engnzg irw' the sui a spriiigactuatcd rctainer engaging bolt on the s the holt ciil-ated, and. holdi it in rctri. born he retainer being disconti ed or apertured at one point oehct to admit the bolt anddoct; the means for closing" the bolt, and means cor clos ochet to exclude ectcd' to the control means L close ti illustruteiit a satiety accordance with the invention.

(it these drawings the switch handle cutaway tor showing dia 'rain inn plus, batteries :1.

a sit" elevation, .L tion; Fig; i i taken at con: acted in inure i o. connections. Fig. 2

8- is a treat elevacentral secti f3; and Fit 1) 1* switch, the e e i in... in. control ta trom :tide of the hicle.

Referring to the the de ice-incl at 2 on supp ings by numera" lever l pivot to a base {i suits. le insulating: met it upon which i mounted station ry term rails or contacts '5 adapted to cooperate with moving contac s 6 carried by the switch and the contacts 6 are separated by an arm central at 9, of less catent than that of the arc separating the terminals 5 so charging plug andmo' cannot both he c 1011" at the same ti'gin (it the 1 are for 'runni and y The supp 3 1S 4 ctri city :co to th initteriees t,

tea

ievey carrying a contact member, a epiing-pressefi latch inelosed within the lever; and not Within the control of the cap emter 5501 hating the switch out and holde ing the eircuit open, and a-member cenneeteat it and actuated. by the controller fer renderieg said leaking" means ineperative when the eextiti'oiier is'atneutral, the switch when closed being free so that it can be thrown open at anytime.

2. Ire-an electricaily driven metor vehicle,

2; contreiiei', switch-for making and breaking the circuit autematic-mea'ns for leeking the switeh out 0f cent-act, holding, the cir ceiit ripen, means fer eenterin the switei'i brin iig it into leaking position Wilt eat if eente'ct, and means e114 said locking meant iiithe co'iitreller is neutral. electrically driven meter vehicle, pivoted switch for making and breaking the circuit, a s ringectiiated bolt on seiti. ewitch, a fixe retainer enthe bolt as the swieh is oscillated midiieiciing it in retracted position, the re "1e." b epertui'ed to' release the bait and i'eeeiv it to hold. the switch in inoperative pesitieii when the circuit is open, means for ciosing'the aperture in the retainer, and means eemieeted the centroiier and to the actuating the letter to a ecm Cher,

trieeliiy driven motor vehicle, piv-eted switch feimaking circuit, a, spring-actuated on i e tch, a fixed retainer engaging the belt the switch is oscillated and. holding it is retrectei position, the retainer being epertiii'ed t0 admit the bolt to hold the switch in inoperative position with the circuit egen, means for closing the aperture in the .i'etzfner, and means coiinected to tauntroiim? and to the closing means fer actmiiii ti .tter to close the aperture when the cent; 6116i 18 in neutral position.

181, the ewitcii being in the 150ml of atioiiei". piviireeiiiiig the we We bait carried by 1.1M? engaging the 8EC1LL2tU3fi and halving we, the retainer being admit the iieit, 2e 1e ieegei tive position sliding pin for retainer and it-ed I v w said as the it in retractet \epei'tuised the v the suii ace trailer is iii. neiiti pesitiem eiosing the ipz-artiire free ewiteii,

anteiectrieiiiiy driven motor vehicle; a rotary eeiitieiiei teh for making anti breaking t eirciit a. leaking member, means "mime, said member, a fixed the ioekingmem- 01:, seeket iii tie fibfl!" into which it 'regististtiee it open, means .oviiig with timeouotigig i zei'eber 'te centre is at motor the aim L; epen, e. e the lever nopemtive walk, means ill- )16 key fez: 0pioeing means he- 7 {thing the (31':- mot 13 e stemge f. te the charging tee the meter, in the battery isepeietefil.

izztiii" switch ever andmeans "for mg the locking \xei ltilmGLASHAN.

to the leakingvehicle, I 

